.layui-tab-title li:first-child > i {
    display: none;
}

.layui-tab .site-demo-title {
    position: fixed;
    left: 200px;
    right: 0;
    top: 60px;
    padding-top: 10px;
    z-index: 997;
    background: #fff;
}

.layadmin-iframe {
    box-sizing: border-box;
    position: absolute;
    width: 100%;
    height: 100%;
    margin: 1rem;
}